RC3225F6650CS Equivalent & Substitute Parts Reference

Part Overview

The RC3225F6650CS is a 665 Ohm ±1% thick film chip resistor manufactured by Samsung Electro-Mechanics in the 1210 (3225 Metric) package format. This component is rated for 0.333W (1/3W) power dissipation with moisture-resistant construction and operates across the temperature range of -55°C to 155°C. The part maintains Active product status with 871 pieces currently in stock.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the 1210 package family. Alternative sources become necessary for supply chain continuity, extended lead time mitigation, or specific application requirements such as automotive qualification.

Substiute Parts

RC3225F6650CS

Samsung Electro-MechanicsIn Stock: 975RC3225F6650CS Datasheet

Current PartRFQ

CRCW1210665RFKEA

Vishay DaleIn Stock: 6035CRCW1210665RFKEA Datasheet

SimilarRFQ

ERJ-14NF6650U

Panasonic Electronic ComponentsIn Stock: 15982ERJ-14NF6650U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RC3225F6650CS is determined by the following criteria:

Mandatory Matching Parameters:

• Resistance value: 665 Ohms
• Tolerance: ±1%
• Package format: 1210 (3225 Metric)
• Composition: Thick Film
• Temperature coefficient: ±100ppm/°C
• Operating temperature range: -55°C to 155°C
• Moisture Sensitivity Level: MSL 1 or better
• RoHS compliance: ROHS3 Compliant

Allowable Variation:

• Power rating: Substitute parts may exceed the 0.333W specification, provided the package dimensions remain within 1210 (3225 Metric) constraints. Higher power ratings do not compromise circuit compatibility in applications requiring 0.333W or less.

Identified Substitutes:

1. CRCW1210665RFKEA (Vishay Dale) – 0.5W rated, automotive AEC-Q200 qualified
2. ERJ-14NF6650U (Panasonic Electronic Components) – 0.5W rated, automotive AEC-Q200 qualified, Not For New Designs status

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: CRCW1210665RFKEA (Vishay Dale)

The CRCW1210665RFKEA is the preferred substitute for the RC3225F6650CS. Both parts maintain identical electrical specifications (665 Ohms ±1%, ±100ppm/°C, -55°C to 155°C operating range) and mechanical compatibility within the 1210 package. The CRCW1210665RFKEA provides enhanced power handling at 0.5W, which is compatible with applications designed for 0.333W operation. The part carries Active product status and AEC-Q200 automotive qualification, ensuring continued availability and reliability for both general and automotive applications. ROHS3 compliance and MSL 1 rating match the original specification.

Secondary Substitute: ERJ-14NF6650U (Panasonic Electronic Components)

The ERJ-14NF6650U meets all electrical and mechanical substitution criteria with identical resistance, tolerance, temperature coefficient, and operating range. The 0.5W power rating provides equivalent or superior performance in 0.333W applications. However, this part carries a "Not For New Designs" product status, indicating Panasonic has discontinued active development. This part is suitable for legacy system maintenance or replacement scenarios where existing inventory is available, but should not be selected for new product designs. ROHS3 compliance and MSL 1 rating are maintained.

Selection Logic:

• For new designs or long-term supply requirements: Select CRCW1210665RFKEA
• For automotive applications requiring AEC-Q200 qualification: Both CRCW1210665RFKEA and ERJ-14NF6650U qualify; prefer CRCW1210665RFKEA due to Active status
• For legacy system support: ERJ-14NF6650U remains compatible if existing inventory is available

Frequently Asked Questions (FAQ)

Q: Can the CRCW1210665RFKEA replace the RC3225F6650CS in existing designs?

A: Yes. The CRCW1210665RFKEA is electrically and mechanically compatible. Both parts share identical resistance (665 Ohms), tolerance (±1%), temperature coefficient (±100ppm/°C), and operating range (-55°C to 155°C). The higher power rating (0.5W vs. 0.333W) does not create compatibility issues in circuits designed for 0.333W operation. Physical dimensions remain within 1210 package specifications.

Q: What is the difference between the 0.333W and 0.5W power ratings?

A: Power rating indicates the maximum continuous power dissipation the resistor can safely handle. A 0.5W-rated resistor can dissipate more heat than a 0.333W-rated resistor. In applications requiring only 0.333W or less, a 0.5W substitute operates within safe thermal limits and provides design margin. The substitute does not reduce performance in lower-power applications.

Q: Why is the ERJ-14NF6650U marked "Not For New Designs"?

A: This designation indicates that Panasonic has discontinued active development and marketing of this part number. While existing inventory may be available and the part remains functionally compatible, Panasonic does not recommend its use in new product designs. For new designs, the CRCW1210665RFKEA (Active status) is the preferred choice.

Q: Are all three parts ROHS3 compliant?

A: Yes. The RC3225F6650CS, CRCW1210665RFKEA, and ERJ-14NF6650U all carry ROHS3 Compliant status, confirming compliance with Restriction of Hazardous Substances regulations.

Q: Do the substitute parts fit the same PCB footprint?

A: Yes. All three parts use the 1210 (3225 Metric) package format with identical footprint dimensions (0.126" L x 0.098-0.100" W). Physical placement on PCB is interchangeable. Slight height variations (0.024" to 0.028" seated height) do not affect standard PCB assembly processes.

Q: Which substitute should I select for automotive applications?

A: Both CRCW1210665RFKEA and ERJ-14NF6650U carry AEC-Q200 automotive qualification. For new automotive designs, select CRCW1210665RFKEA due to its Active product status. For legacy automotive system support, ERJ-14NF6650U remains qualified if inventory is available.

Q: What is MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level. Parts with MSL 1 rating require no special moisture control during storage, handling, or assembly. "Unlimited" means the part can be stored indefinitely without moisture-related degradation, providing maximum flexibility in supply chain management.